COVID-19 Key Events Timeline 2019–2023¶
Specification¶
The full specification below is extracted from Chapter 19: "COVID-19 as a Public Health Master Case Study".
Type: microsim
**sim-id:** covid-timeline<br/>
**Library:** p5.js<br/>
**Status:** Specified
Interactive horizontal timeline of COVID-19 key events from December 2019 through December 2023. Events are rendered as labeled nodes on a timeline track; clicking any node expands a tooltip with a 2–3 sentence description of the event's public health significance. Categories: Origins & Detection (blue), Variants (orange), Vaccines (green), Policy (purple), Data/Surveillance (teal). Events include: Dec 2019 Wuhan cluster; Jan 2020 genome published; Jan 2020 WHO PHEIC; Mar 2020 WHO pandemic declaration; Apr 2020 first wave peaks US; Nov 2020 Alpha detected; Dec 2020 first EUAs US; Jan 2021 vaccine rollout; Mar 2021 COVAX first deliveries; May 2021 Delta dominant; Sep 2021 booster authorization; Nov 2021 Omicron detected; Feb 2022 Omicron peak US; May 2022 WHO PHEIC downgrade under review; May 2023 WHO ends PHEIC. Slider at bottom allows zooming to sub-periods. Color legend shown in upper right.